By the early 2000s, worker productivity growth spiked as more temporary workers were employed as they looked for more permanent work. how did this affect the natural unemployment rate?

The natural unemployment rate decreased as fewer workers were without jobs while looking for more permanent jobs.

Explanation:

The natural unemployment rate decreased as fewer workers were without jobs while looking for more permanent jobs.

Every one want a permanent job because in the permanent job worker gets more moral support from the work.But on the other hand in the temporary job worker feels insecure and did not feel well in the the industries.

you answered your own : -/